E36 318I Weird Heater Problems

[mustang_john]

Right guys, get your thinking caps on!

I have an E36 318i with air con. So the heater valve is the 3 hole type. My car has LPG fitted. The heater is the dual zone, digital control type.

The heater pipes have been T'd into were the heater pipes exit the bulkhead, the additional hoses run below the inlet manifold, up over the top of the radiator to the LPG vapoursier and back.

Here's the fault.

The heater will only blow hot air from the passenger side vents. Except for one instance. If you turn the car to the right, the heater suddenly blows hot air from the drivers side vents. Once you go straight again, it steadily cools until cold.

I have bled the system using the vent in the radiator, even going so far as to jack up the left front of the car sky high whilst bleeding it.

All to no avail. I have replaced the heater valve once and discovered that the old one was fine. So i'm stumped and cold!

Any thoughts on were to try next?

Oh and for anyone outside of the UK, the car is right hand drive.

Cheers guys.

[Skiboy76]

That is weird mate.

Have you asked BMW?

[IanIOM]

You have a air lock.

[mustang_john]

You have a air lock.

I did wonder, but thought, hoped i'd got rid of it. How the heck can I erradicate the air lock fully?

Cheers.

John.